python 代码实现文件下载功能

痛定思痛。 2022-05-24 08:47 246阅读 0赞

# python 代码实现文件下载功能 #

#!/usr/bin/env python3
    
    import requests;
    from contextlib import closing
    
    
    class ProgressBar(object):
        def __init__(self, title, count=0.0, run_status=None, fin_status=None, total=100.0, unit='', sep='/', chunk_size=1.0):
            super(ProgressBar, self).__init__()
            self.info = "[%s] %s %.2f %s %s %.2f %s"
            self.title = title
            self.total = total
            self.count = count
            self.chunk_size = chunk_size
            self.status = run_status or ""
            self.fin_status = fin_status or " " * len(self.statue)
            self.unit = unit
            self.seq = sep
    
        def __get_info(self):
            # 【名称】状态 进度 单位 分割线 总数 单位
            _info = self.info % (self.title, self.status, self.count/self.chunk_size, self.unit, self.seq, self.total/self.chunk_size, self.unit)
            return _info
    
        def refresh(self, count=1, status=None):
            self.count += count
            # if status is not None:
            self.status = status or self.status
            end_str = "\r"
            if self.count >= self.total:
                end_str = '\n'
                self.status = status or self.fin_status
            print(self.__get_info(), end=end_str)
    
    def main():
        #要下载文件的地址
        with closing(requests.get("https://dev.mysql.com/get/Downloads/MySQL-5.6/mysql-5.6.40-winx64.zip", stream=True)) as response:
            chunk_size = 1024
            content_size = int(response.headers['content-length'])
            progress = ProgressBar("razorback", total=content_size, unit="KB", chunk_size=chunk_size, run_status="正在下载", fin_status="下载完成")
            # chunk_size = chunk_size < content_size and chunk_size or content_size
            # 你将要保存文件的位置和名字
            with open('./mysql.zip', "wb") as file:
                for data in response.iter_content(chunk_size=chunk_size):
                    file.write(data)
                    progress.refresh(count=len(data))
    
    if __name__ == '__main__':
        main()